Giascorr—A List of some of the Rotifera of Ireland. 69 
and much less recurved than represented in the figure of the 
Monograph. The little globular ball noticed by Mr. Gosse was 
not present, but I have seen it-in Diaschiza semi-aperta, a mere 
bubble which floated away. | 
| Habitat.—Amongst algze in ponds and bogs, Co. Waterford. 
Diaschiza semiaperta, Gosse. 
[The Rotifera, vol. ii. p. 80, Pl. XXII. fig. 10.] 
Not so frequent as the foregoing species. It was only after 
long and careful watching that I was enabled to satisfy myself of 
this creature’s identity ; for, although agreeing in most particulars 
with the figure and description in the Monograph, the gape at the 
lower end of the dorsal cleft was not apparent. This I found to 
be due to the fact that it was as frequently closed as open. If a 
good vertical view be obtained, the strange manner of the creature 
will show this clearly. ‘These manners are so highly characteristic 
that I wonder they have not received more definite notice: when 
feeding it incessantly withdraws the foot with a jerk, throwing 
_ back the long pointed toes on either side of the body, at the same 
time burying the head far back upon the neck within the lorica, 
thus assuming an almost spherical shape. When in this position 
the plates of the lorica are drawn apart to their fullest extent, and 
a wide gap is seen throughout their entire length; then, as the 
toes are brought down, and the head again protruded, they are 
drawn together, and the temporary aperture is closed more or less 
entirely according to the varying undulations of the body. This 
practice has, I believe, something to do with the digestive process, 
for it always occurs when the animal is feeding, and is followed by 
various evolutions of the internal organs. 
Habitat.—Bogs, streams, and ponds in Co. Wexford ; bog- 
moss, Co. Kerry ; a pond, Co. Waterford. 
Salpina mucronata, Ehrenberg. 
[The Rotifera, vol. 11. p. 83, Pl. XXII. fig. 1.] 
A rare species. 
Habitat.—A pond, a marsh-drain, Co. Wexford. In bog-moss, 
Co. Kerry. 
